Eastport quadrangle notebook #2, 1907
Page 12
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Transcription
"solitary" their occurrence as widely isolated specimens as contrasted with the abundantly O gregious modes of occurrence usual in gneissatics. These slates are cut by a couple of gabbro- dikes, 1073 and 1074. The former is a 15 foot vertical dike, N. 33-35° E., and is separated only by a couple of yards from 1074. A third is also vertical, only 10ft. south, N 38° E., N 30° E. 1073 is much jointed and curiously enough the joints are parallel to the dike's trend N. 53° E. will a few joints of Dikes 1074 also abundant sometimes clearly crossed joints in the 1073 at first sight East the same direction as the cleavage plane but a more detailed trace of readings show a uniform direction of the slaty cleavage (in. the immediate vicinity) to be N. 42-45° East. These two dikes near the edge of the exposures of slate; type near the slaty cleavage is uniform N. 42-45° E., but a couple of hundred yards northwest near the Pata creek in Eastern C. 12. the direction of the clear- age in the slates is N. only 32° E. It is a ridiculous fact that the shales or slates are tabulated for several yards each side of the gabbro indicating either that the gabbros was a better network host than the rhyolite dikes or that the stability was as the time for folding the surfaces. The slaty cleavage is not better developed in close proximity to the gabbro dikes; in fact it is only barely discernible within a couple of yards of the gabbro dikes where the both are now metamorphosed laked were in less solidly. There are also buff and cream colored thick slices of rhyolite porphyry with flow structure well developed parallel to the dikes. Dike dikes weather a ye General color specimens collected by C. S. B. On the west side of dike rock near more exposures of dark blue to nearly black slates which are slightly inclined and which exhibit better slaty cleavage than from the rock south of Wardswards Point. In places these dark slates have been ribboned and are yet thickly void the fingers when banded resembling cork. They contain no poroids - they are associated with massive bodies of gabbro which, in places exhibit well developed vertical selvetics. I saw all along the same southwest of Lead Rock in "Lubec rock" on map). A specimen of the slaty gabbro is 1079 and of the sheared dark slate 1080. Both seen in B. 41/7. Tuesday, July 2, 1907. EASTPORT QUAD. C. L. BREGER On Lubec Road near more more exposures of slaty shales variety beds of a dark Blue with slaty shales beds are slightly sheared with the structure apparently parallel to bedding. The beds are largely inclined & contorted by the gabbro injections of which a specimen was collected = 1081 North Lubec. S. of Perry Wharf. Tumulous gabro = 1082. The various gabros occurs as a stock of large size at and near the Perry landing both north & south of the bluff. The gabbros are strongly Gneissoids & in a few places amygdoloidal, only very massive. 7-the southern third of 6.343 is composed of a massive gneiss with small white felspars scattered the surface now as "...".